Hi,
On French keyboards key combinations with 'AltGr' don't generate characters in text fields.
The characters which don't appear are : "#" "{" "[" "|" "`" "\" "@" "]" "}" "¤" "€"
Strangely '^' is displayed correctly.
I joined a screenshot of a french keyboard layout with the characters not appearing circled in red and the AltGr key (right Alt key) in a blue square.
Regards